I don't think mushroom lifters for a mopar

If you bush the tappet bores you can use any mushroom.

BTW: an extreme example of "larger lobe contact surface with the same tappet body diameter": 1941-52 Harley-Davidson WR. Tappet is .731" OD, the "ice skate" (foot) is over an inch; note the asymmetry.


Boffin Emeritus